DIO-1 is an I/O expander board with 8 open/collector outputs (each capable of 400mA) and 12 TTL/CMOS inputs/outputs. DIO-1 has a PIC16C62 microcontroller that acts as an I2C 2-wire slave device. It also can be used as a standalone PIC microcontroller board.

The I2C bus pins and the power supply connections are available on a 20-pin (2×10) expansion connector for interfacing to existing microcontroller systems. This board can be connected either as a piggyback daughterboard on a microcontroller board (one with a matching connector) using standoffs or can be placed away from the microcontroller board using a 20-wire ribbon cable.

The expansion connector is plug-in compatible with MicroTRAK, MINI-MAX and BSCB systems. You can use it in your own system too, of course; see the manual for the expansion connector's pinout.

I/O Expander Board Features

Can be used as a daughterboard or as a standalone microcontroller board